My Hypptv STB also mess up my ARC setting using Sony soundbar.
I cant even control my soundbar volume using volume button Astro controller.

I connect using Astro & Hypptv using UGreen HDMI joiner(or sort of the name),
and the output to my Samsung TV.

When the Hypptv Off, all of the controller, even my PS4 not working correctly.
But, when the Hypptv is ON position, all working correctly.

Deng!!!Membazir electric ajer...

My connection:
Sony Soundbar
HDMI 1: PS4
HDMI 2: Media Player
HMDI 3: Ugreen HDMI joiner (Astro+Hypptv)

ARC output: Samsung TV

Is there anyone here complaint with TM regarding their lousy Hypptv Android Box messing with ARC? Maybe a firmware updates can solve this?